This plugin plots the position of stars with exoplanets. Exoplanets data is derived from "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]"

+

This plugin plots the position of stars with exoplanets. Exoplanets data is derived from "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]". List of potential habitable exoplanets and data about them were taken from "[http://phl.upr.edu/projects/habitable-exoplanets-catalog The Habitable Exoplanets Catalog]" by [http://phl.upr.edu/home Planetary Habitability Laboratory].

+

+

Example (HD 13808):

+

+

http://stellarium.org/wikiimg/exoplanets/exoplanets.jpg

+

+

===Potential habitable exoplanets===

+

Since version 0.2.0 (Stellarium 0.13.0) this plugin can display potential habitable exoplanets (orange marker) and some information about those planets - habitable class, mean surface temperature and Earth Similarity Index.

* '''Mean Surface Temperature''' — Temperature in (K)<ref>Stellarium re-calculate temperature in (°C).</ref> based on a similar terrestrial atmosphere to planet mass ratio and a greenhouse effect due to 1 percent of CO<sub>2</sub> (assuming an albedo of 0.3 in all cases).

+

* '''[http://en.wikipedia.org/wiki/Earth_Similarity_Index Earth Similarity Index] (ESI)''' — Similarity to Earth on a scale from 0 to 1, with 1 being the most Earth-like. ESI depends on the planet's radius, density, escape velocity, and surface temperature.

+

+

==Section [Exoplanets] in config.ini file==

+

You can edit <tt>config.ini</tt> file by yourself for changes of the settings for the Exoplanets plugin - just make it carefully!

+

+

{| class="guidetable"

+

| rowspan="2" | ''ID''

+

| rowspan="2" | ''Type''

+

| colspan="2" style="text-align:center;" | ''Version''

+

| rowspan="2" | ''Description''

+

|-

+

| ''Plugin''

+

| ''Stellarium''

+

|-

+

|last_update

+

|string

+

|0.1.2+

+

|0.11.4+

+

|Date and time of last update

+

|-

+

|update_frequency_hours

+

|int

+

|0.1.2+

+

|0.11.4+

+

|Frequency of updates, in hours

+

|-

+

|updates_enable

+

|bool

+

|0.1.2+

+

|0.11.4+

+

|Enable updates of exoplanets catalog from Internet

+

|-

+

|url

+

|string

+

|0.1.2+

+

|0.11.4+

+

|URL of exoplanets catalog

+

|-

+

|flag_show_exoplanets_button

+

|bool

+

|0.1.11+

+

|0.12.3+

+

|Enable showing button of exoplanets on bottom bar

+

|-

+

|distribution_enabled

+

|bool

+

|0.1.4+

+

|0.12.0+

+

|Enable distribution mode of display

+

|-

+

|timeline_enabled

+

|bool

+

|0.1.4+

+

|0.12.0+

+

|Enable timeline mode of display

+

|-

+

|habitable_enabled

+

|bool

+

|0.2.0+

+

|0.13.0+

+

|Enable habitable mode of display

+

|-

+

|enable_at_startup

+

|bool

+

|0.1.10+

+

|0.12.2+

+

|Enable displaying exoplanets at startup of the plugin

+

|-

+

|exoplanet_marker_color

+

|R,G,B

+

|0.2.0+

+

|0.13.0+

+

|Color for marker of star with planetary system

+

|-

+

|habitable_exoplanet_marker_color

+

|R,G,B

+

|0.2.0+

+

|0.13.0+

+

|Color for marker of star with planetary system with potential habitable exoplanets

+

|}

==Using the Exoplanets plugin==

==Using the Exoplanets plugin==

Line 29:

Line 118:

"angleDistance": angle distance from star (arcseconds),

"angleDistance": angle distance from star (arcseconds),

"discovered": exoplanet discovered year,

"discovered": exoplanet discovered year,

+

"hclass": "habitable class",

+

"MSTemp": mean surface temperature (K),

+

"ESI": Earth Similarity Index (*100),

"planetName": "designation of planet"

"planetName": "designation of planet"

},

},

Line 40:

Line 132:

"angleDistance": angle distance from star (arcseconds),

"angleDistance": angle distance from star (arcseconds),

"discovered": exoplanet discovered year,

"discovered": exoplanet discovered year,

+

"hclass": "habitable class",

+

"MSTemp": mean surface temperature (K),

+

"ESI": Earth Similarity Index (*100),

"planetName": "designation of planet"

"planetName": "designation of planet"

}

}

Line 50:

Line 145:

"sradius": value of radius of star (R sun),

"sradius": value of radius of star (R sun),

"effectiveTemp": value of effective temperature of star (K),

"effectiveTemp": value of effective temperature of star (K),

+

"hasHP": boolean (has potential habitable planets),

"RA": "Right ascension (J2000)",

"RA": "Right ascension (J2000)",

"DE": "Declination (J2000)"

"DE": "Declination (J2000)"

Line 120:

Line 216:

| Improvements for search tool. Updated code. Improvements for GUI.

| Improvements for search tool. Updated code. Improvements for GUI.

|-

|-

−

| ''0.1.10''

+

| 0.1.11

−

| ''0.12.3''

+

| 0.12.3

| 1

| 1

−

|

+

| Updated code.

+

|-

+

| 0.2.0

+

| 0.13.0

+

| 1

+

| Displaying of the potential habitable exoplanets. Improvements for performance and code refactoring.

|}

|}

Line 130:

Line 231:

* Jean Schneider (Maintainer of "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]" who grant permission us use its catalog).

* Jean Schneider (Maintainer of "[http://exoplanet.eu/ The Extrasolar Planets Encyclopaedia]" who grant permission us use its catalog).

Mean Surface Temperature — Temperature in (K)[1] based on a similar terrestrial atmosphere to planet mass ratio and a greenhouse effect due to 1 percent of CO2 (assuming an albedo of 0.3 in all cases).

Earth Similarity Index (ESI) — Similarity to Earth on a scale from 0 to 1, with 1 being the most Earth-like. ESI depends on the planet's radius, density, escape velocity, and surface temperature.

Section [Exoplanets] in config.ini file

You can edit config.ini file by yourself for changes of the settings for the Exoplanets plugin - just make it carefully!

ID

Type

Version

Description

Plugin

Stellarium

last_update

string

0.1.2+

0.11.4+

Date and time of last update

update_frequency_hours

int

0.1.2+

0.11.4+

Frequency of updates, in hours

updates_enable

bool

0.1.2+

0.11.4+

Enable updates of exoplanets catalog from Internet

url

string

0.1.2+

0.11.4+

URL of exoplanets catalog

flag_show_exoplanets_button

bool

0.1.11+

0.12.3+

Enable showing button of exoplanets on bottom bar

distribution_enabled

bool

0.1.4+

0.12.0+

Enable distribution mode of display

timeline_enabled

bool

0.1.4+

0.12.0+

Enable timeline mode of display

habitable_enabled

bool

0.2.0+

0.13.0+

Enable habitable mode of display

enable_at_startup

bool

0.1.10+

0.12.2+

Enable displaying exoplanets at startup of the plugin

exoplanet_marker_color

R,G,B

0.2.0+

0.13.0+

Color for marker of star with planetary system

habitable_exoplanet_marker_color

R,G,B

0.2.0+

0.13.0+

Color for marker of star with planetary system with potential habitable exoplanets

Using the Exoplanets plugin

Enable the tool by clicking the tool-bar button "Load at startup"

Find the stars with exoplanets by their designation (24 Sex as example)

Catalog of stars with exoplanets

You can modify the exoplanets.json file manually using a text editor. If you are using Windows, it is strongly recommended to use an advanced text editor such as Notepad++ to avoid problems with end-of-line characters. (It will also color the JSON code and make it easier to read.)

Warning: Before editing your JSON file, make a backup copy. Leaving out the smallest detail (such as a comma or forgetting to close a curly bracket) will prevent Stellarium from starting.

The path to the directory which contains exoplanets.json is something like: